Ultrasonic Level Sensor Prosonic FDU91

Application

The FDU91 ultrasonic sensor provides continuous, non-contact, and maintenance-free level measurement for liquids, pastes, sludges, and bulk materials, ranging from fine powders to coarse substances. It is also suitable for flow measurements in open channels and measuring weirs. The sensor’s performance is unaffected by dielectric constant, density, or humidity, and the self-cleaning effect prevents buildup. Suitable for use in explosion-hazardous environments, the FDU91 offers a maximum measuring range of up to 10 meters (33 ft) for liquids and 5 meters (16 ft) for solids.

This sensor is ideal for continuous level measurement of fluids and bulk materials in applications such as silos, conveyor belts, stockpiles, and crushers. It is also used for flow measurement in open channels and weirs, particularly where low structural height is required.

• Process connection: Thread
• Operating temperature: -40 to +80°C (-40 to +176°F)
• Operating pressure: +0.7 to +4 bar (+10 to +58 psi)
• Maximum measuring range: 10 meters (33 ft) for liquids, 5 meters (16 ft) for solids
• Blocking distance: 0.3 meters (1 ft)
• International explosion protection certificates

Benefits

• Equipped with an integrated temperature sensor for Time-of-Flight correction, ensuring accurate measurements even with temperature fluctuations.
• The hermetically sealed PVDF sensor offers excellent chemical resistance, making it ideal for harsh environments.
• Capable of operating in challenging conditions, with the option for remote installation from the transmitter (up to 300 meters).
• The self-cleaning sensor design minimizes buildup, ensuring reliable performance.
• Features automatic sensor detection for easy commissioning with FMU90/FMU95 transmitters.
• Weather-resistant and flood-proof (IP68) for reliable operation in all conditions.
• Optional integrated heating prevents ice buildup on the sensor, ensuring consistent measurement in freezing environments.

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